Ok, I have made some findings about this which may cast some light: I think Tomcat can't load correctly the web.xml configuration file when I use my custom authenticator method. I use this lines in web.xml to specify which authenticator module should be used: <login-config> <auth-method>CUSTOM</auth-method> <realm-name>Custom Realm</realm-name> <form-login-config> <form-login-page>/login.jsp</form-login-page> <form-error-page>/error.jsp</form-error-page> </form-login-config> </login-config> I suspect Tomcat does not know that it must take into account "form-login-config" fields. My custom authenticator is just FormAuthenticator modified, so Tomcat should be configured in the same way. What do you think about this? How can I tell Tomcat to read the form-login-config fields? Thanks, Antonio View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4083884#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...